Help pinpointing high HTTPD CPU usage in TOP Post: 302265183

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Operating Systems Linux Help pinpointing high HTTPD CPU usage in TOP Post 302265183 by csorhand on Friday 5th of December 2008 09:31:21 PM

12-05-2008

Registered User

pspace,

You can check your httpd service if your using prefork or worker by typing

httpd -V and look for "-D APACHE_MPM_DIR="server/mpm/prefork"
that means your using prefork. if your MPM is worker then adjust instead of the prefork

<IfModule prefork.c>
StartServers 16
MinSpareServers 16
MaxSpareServers 64
ServerLimit 512
MaxClients 512
MaxRequestsPerChild 4000
</IfModule>

Bigger settings doesnt mean good for server. Your settings is a bloated at prefork settings and also workers MPM.

Please take a look at this site. or research more in performance tuning.

(dv) HOWTO: Basic Apache performance tuning (httpd))

Just to give you idea, 1 httpd process sometimes consumes about 128 MB of your memory and based on your settings if you started 16 httpd process(startservers) multply by 128 MB plus additional 16 more (min spare) thats a lot of memory consumption. I never include the max clients that is allowed.

So bigger is not always good for settings in apache.conf. You can google for apache performance to look for more answer. Cheers

csorhand

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a2ensite

A2ENSITE(8)						      System Manager's Manual						       A2ENSITE(8)

NAME

       a2ensite, a2dissite - enable or disable an apache2 site / virtual host

SYNOPSIS

       a2ensite [site]

       a2dissite [site]

DESCRIPTION

       This manual page documents briefly the a2ensite and a2dissite commands.

       a2ensite is a script that enables the specified site (which contains a <VirtualHost> block) within the apache2 configuration.  It does this
       by creating symlinks within /etc/apache2/sites-enabled.	Likewise, a2dissite disables a site by removing those  symlinks.   It  is  not	an
       error to enable a site which is already enabled, or to disable one which is already disabled.

       The default site is handled specially: The resulting symlink will be called 000-default in order to be loaded first.

EXAMPLES

	      a2dissite default

       Disables the default site.

FILES

       /etc/apache2/sites-available
	      Directory with files giving information on available sites.

       /etc/apache2/sites-enabled
	      Directory with links to the files in sites-available for enabled sites.

SEE ALSO

       apache2ctl(8).

AUTHOR

       This  manual  page  was written by Stefan Fritsch <sf@debian.org> (based on the a2enmod manual page by Daniel Stone <daniel@sfarc.net>) for
       the Debian GNU/Linux distribution.

								    8 June 2007 						       A2ENSITE(8)